Journal of cardiothoracic and vascular anesthesia
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J. Cardiothorac. Vasc. Anesth. · Jun 2012
Vascular surgery patients prescribed preoperative β-blockers experienced a decrease in the maximal heart rate observed during induction of general anesthesia.
To investigate the association of preoperative β-blocker usage and maximal heart rates observed during the induction of general anesthesia. ⋯ Preoperative β-blockade of vascular surgery patients undergoing general anesthesia is associated with a lower maximal heart rate during anesthetic induction. There may be potential benefits in administering β-blockers to reduce physiologic stress in this surgical population at risk for perioperative cardiac morbidity. Future research should further explore intraoperative hemodynamic effects in light of existing practice guidelines for optimal medication selection, dosage, and heart rate control.
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J. Cardiothorac. Vasc. Anesth. · Jun 2012
Respiratory variations of R-wave amplitude in lead II are correlated with stroke volume variations evaluated by transesophageal Doppler echocardiography.
The authors hypothesized that variations in electrocardiographically derived R-wave amplitude might be correlated with mechanical ventilation-induced variations in stroke volume as determined by transesophageal echocardiography. ⋯ ΔRII is correlated with stroke volume variations as determined by transesophageal echocardiography in mechanically ventilated patients and can identify the stroke volume variation cutoff of 15%, previously determined to be the cutoff for volume responsiveness.
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J. Cardiothorac. Vasc. Anesth. · Jun 2012
Characterization of pulmonary and systemic inflammatory responses produced by lung re-expansion after one-lung ventilation.
To characterize the pulmonary and systemic inflammatory responses of rats undergoing 1-hour or 3-hour one-lung ventilation (OLV) with subsequent 1-hour lung re-expansion. ⋯ Lung re-expansion after bronchial occlusion evokes an acute lung inflammatory response, which has been shown to be more pronounced in long periods of bronchial occlusion in terms of cytokine inflammatory response. In addition, the magnitude of this inflammatory response also can be detected systemically.
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J. Cardiothorac. Vasc. Anesth. · Jun 2012
Use of rapid "rescue" perioperative echocardiography to improve outcomes after hemodynamic instability in noncardiac surgical patients.
To investigate if modified "rescue" echocardiography enhanced management during perioperative hemodynamic instability in patients undergoing noncardiac surgery. ⋯ Both TTE and TEE can play a critical role in the diagnosis and management of perioperative hemodynamic instability.